﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace DienThoai.CONTROLLERS
{
    class BillController
    {
        private static BillController instance;

        public static BillController Instance
        {
            get
            {
                if (instance == null)
                {
                    instance = new BillController();
                }
                return instance;
            }
        }

        private BillController() { }
    }
}
